Attacker can freeze chain and steal challenge deposits using fake `prevStateRoot`

Sequencer will be underpaid because of incorrect `commitScalar`

Any sequencer can finalize arbitrary L2 blocks by committing during a challenge period

Sequencer can avoid being slashed for invalid batch

L1 re-org can cause valid challenge to be lost

`Rollup.sol` cannot split batches across blobs, allowing inexpensive block stuffing